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run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = 'This: (This is a test :))'; echo preg_replace('/[^\(\)(?:\:(?=[\(\)]))]/','',$string);
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace(): Compilation failed: unmatched parentheses at offset 20 in /in/OcArV on line 4
Output for 4.3.0 - 4.3.10, hhvm-3.10.0 - 3.12.0
Warning: Compilation failed: unmatched parentheses at offset 20 in /in/OcArV on line 4